A note on inflation in dRGT massive gravity

TL;DR

This paper explores the potential for certain Lagrangians with poles to justify inflation within dRGT massive gravity, aligning with observational data and extending the theory's applicability beyond late-time acceleration.

Contribution

It demonstrates that specific pole-containing Lagrangians can successfully produce inflation in dRGT massive gravity, a novel approach in this context.

Findings

Lagrangians with poles can generate inflation in dRGT massive gravity.

Results are consistent with Planck 2018, BK18, and BAO observational data.

The approach extends the applicability of dRGT gravity to early universe inflation.

Abstract

Although the dRGT massive gravity successfully explains the late-time cosmic acceleration, it cannot justify inflation. On the other hand, and in the frameworks of General Relativity and modified gravity, the interests and attempts to describe dark energy and inflation by using Lagranginas, which may have pole, have recently been enhanced. Subsequently, we are going to show that this kind of Lagrangian may justify inflation in the framework of dRGT massive gravity. The study is done focusing on the power and exponential potentials, and the results show a plausible consistency with the Planck 2018 data and its combination with BK18 and BAO.